Sonic the Hedgehog (Genesis, US)

{:etype "release",
 :doc
 {:game
  {:id "vg-gm-sonic", :etype "game", :title "Sonic the Hedgehog"},
  :notes "Pack-in game for Genesis",
  :title "Sonic the Hedgehog (Genesis, US)",
  :format "Cartridge",
  :region "USA",
  :platform {:id "vg-sys-gen", :etype "system", :title "Sega Genesis"},
  :publisher {:id "vg-co-seg", :etype "company", :title "Sega"},
  :release-date "1991-06-23"},
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